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Mechanical Building Services Design Engineer (HVAC)

📍 Braintree 💷 £35,000 – £45,000 per annum Permanent · Full time Posted 8 Jul 2026

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Mechanical Building Services Design Engineer (HVAC) | Braintree | Office Based | Full Time | £35,000–£45,000 per annum

 

Our client is a specialist energy and engineering consultancy delivering innovative mechanical building services solutions to some of the UK's most recognisable commercial organisations. For almost 20 years, they have helped major property owners, healthcare providers and commercial businesses improve energy performance, reduce carbon emissions and optimise the efficiency of their buildings.

 

Their projects span commercial offices, healthcare facilities, retail environments, industrial premises and other large-scale buildings, giving engineers exposure to technically challenging, real-world Building Services projects from concept through to completion.

Due to continued growth, they are looking for a Mechanical Building Services Design Engineer with experience in HVAC and Building Services design to join their expanding engineering team.

 

This is an excellent opportunity for someone looking to develop their career within a highly respected consultancy that works closely with CIBSE and supports professional development towards Chartered Engineer status.

 

The Role

 

Working alongside experienced Mechanical Building Services Engineers, you will contribute to the design, coordination and delivery of mechanical building services solutions for commercial projects across the UK.

You'll be involved throughout the design lifecycle, producing technical designs, calculations and drawings while gaining exposure to a wide variety of HVAC systems and energy-efficient building technologies.

This is an office-based role where you'll receive ongoing mentoring and support from experienced engineers.

 

Key Responsibilities

  • Assist in the design of mechanical building services systems for commercial buildings
  • Produce HVAC designs including heating, ventilation, air conditioning and associated pipework services
  • Prepare detailed AutoCAD drawings and technical design documentation
  • Assist with mechanical design calculations including heating and cooling loads, ventilation and plant sizing
  • Support the production of specifications, schedules and engineering reports
  • Work alongside senior engineers through all RIBA design stages from concept through to detailed design
  • Coordinate designs with electrical engineers, architects and other project stakeholders
  • Attend design meetings and assist with technical problem solving
  • Ensure designs comply with current Building Regulations, British Standards, CIBSE guidance and industry best practice
  • Contribute towards sustainable and energy-efficient engineering solutions

What We're Looking For

 

Essential

  • Minimum of two years' experience within a Mechanical Building Services, M&E Consultancy, Building Services Consultancy or HVAC Design environment
  • Degree (or equivalent) in Building Services Engineering or Mechanical Engineering
  • Experience producing mechanical building services designs for commercial buildings
  • Good understanding of HVAC systems including heating, ventilation and air conditioning
  • Proficiency with AutoCAD
  • Strong communication skills and ability to work collaboratively within a design team
  • Full UK driving licence

Desirable

  • Experience with Hevacomp, IES VE, Revit MEP or similar Building Services software
  • Knowledge of CIBSE guidance and UK Building Regulations

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